Tricky to learn, the sling uses a different firing motion than any other
ranged weapon. At first, it seems clumsy and awkward, but it soon pays off, as
the spinning motion builds up speed and momentum quickly and the release is
relatively quick and oftentimes very painful.
Note that, while a 'stone'-type nonweapon item can be used with this skill,
'bullet'-type weapons are far more effective.
Syntax: use sling shot at <target> shoot <bullet/stone>
        use sling shot at <target>